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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
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| 3 | * Date: 1.6.2000 |
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| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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| 5 | * |
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| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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| 7 | * low-level infrastructure for developing OS kernels and Embedded |
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| 8 | * Applications; it partially derives from the HARTIK project but it |
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| 9 | * currently is independently developed. |
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| 10 | * |
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| 11 | * OSLib is distributed under GPL License, and some of its code has |
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| 12 | * been derived from the Linux kernel source; also some important |
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| 13 | * ideas come from studying the DJGPP go32 extender. |
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| 14 | * |
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| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
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| 16 | * D.J. Delorie and all the other developers who believe in the |
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| 17 | * freedom of software and ideas. |
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| 18 | * |
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| 19 | * For legalese, check out the included GPL license. |
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| 20 | */ |
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| 21 | |||
| 22 | /* System calls for X extender */ |
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| 23 | /* BIOS Call from X (Basic Reflection Service) */ |
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| 24 | |||
| 25 | #include <ll/i386/hw-data.h> |
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| 26 | #include <ll/i386/x-bios.h> |
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| 27 | #include <ll/i386/mem.h> |
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| 28 | |||
| 313 | giacomo | 29 | #include <ll/i386/advtimer.h> |
| 30 | #include <ll/i386/apic.h> |
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| 31 | |||
| 40 | pj | 32 | FILE(X-BIOS); |
| 2 | pj | 33 | |
| 34 | /* The interface between X (and 32 bit PM) and BIOS (which runs at 16 bits */ |
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| 35 | /* It works as int86() standard library call */ |
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| 36 | |||
| 40 | pj | 37 | void X_callBIOS(int service,X_REGS16 *in,X_REGS16 *out,X_SREGS16 *s) |
| 2 | pj | 38 | { |
| 39 | /* Assembler gate JMP instruction */ |
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| 660 | giacomo | 40 | extern unsigned char use_apic; |
| 2 | pj | 41 | extern void _x_callBIOS(void); |
| 42 | X_CALLBIOS *xbc = x_bios_address(); |
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| 619 | mauro | 43 | DWORD msr1 = 0,msr2 = 0; |
| 2 | pj | 44 | |
| 45 | /* Send interrupt request & register through the X_Info structure */ |
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| 83 | pj | 46 | xbc->_irqno = service; |
| 47 | memcpy(&(xbc->_ir),in,sizeof(X_REGS16)); |
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| 48 | memcpy(&(xbc->_sr),s,sizeof(X_SREGS16)); |
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| 619 | mauro | 49 | if (use_apic) { |
| 313 | giacomo | 50 | rdmsr(APIC_BASE_MSR,msr1,msr2); |
| 51 | disable_APIC_timer(); |
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| 619 | mauro | 52 | } |
| 2 | pj | 53 | /* Back to RM to execute the BIOS routine */ |
| 54 | _x_callBIOS(); |
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| 55 | |||
| 56 | /* Get the return register values */ |
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| 619 | mauro | 57 | if (use_apic) { |
| 313 | giacomo | 58 | wrmsr(APIC_BASE_MSR,msr1,msr2); |
| 59 | enable_APIC_timer(); |
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| 619 | mauro | 60 | } |
| 83 | pj | 61 | memcpy(out,&(xbc->_or),sizeof(X_REGS16)); |
| 62 | memcpy(s,&(xbc->_sr),sizeof(X_SREGS16)); |
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| 2 | pj | 63 | } |